论 文
     专 著
     专 利
     科 普
     人 才
     其 他
 
青藏高原高寒区不同补给湖泊生态..
西北干旱区湖泊水文-生态系统..
东部平原区沼泽湿地与浅水湖泊..
西南湿润区深水湖泊生态系统与生..
 
 
  论文 您的位置:首页 >> 科研成果 >> 论文
论文题目: Nitrogen inputs enhance phytoplankton growth during sediment resuspension events: a mesocosm study
课题编号: 2012CB956104 类别: SCI
作者: He Hu, Yuhui Kang, Zhengwen Liu SCI期刊区属:
杂志名称: Hydrobiologia 卷期:
年份: 2014 是否责任作者:
页码: 标注:
作者单位: 中国科学院南京地理与湖泊研究所 下载:
摘要
Nitrogen (N) and phosphorus (P) are key factors that limit phytoplankton growth in freshwater lakes. Controlling external P loading is a widely recognized measure for reducing eutrophication, but the usefulness of limiting N inputs remains under debate. Shallow lakes with frequent sediment resuspension events exacerbate internal P loading and limit the potential for in-lake P reduction. A two-way factorial mesocosm experiment was carried out using two levels of N inputs (with and without addition of potassium nitrate as N source) and sediment resuspension (with and without resuspension) for 35 days in order to examine the effect of N inputs on phytoplankton growth during sediment resuspension events. N addition alone did not affect phytoplankton biomass in mesocosms in treatments without sediment resuspension, likely due to the P limitation. However, internal P loading, via sediment resuspension, shifted mesocosms from P- to N-limited systems in which N addition significantly boosted phytoplankton biomass. Our results suggested that external loading comprising N alone may enhance phytoplankton growth in shallow, eutrophic lakes with frequent resuspension events like Lake Taihu, China. In such lakes, P-only management is unlikely to usefully reduce eutrophication, and a strategy to reduce both N and P is needed.
 
Copyright (C) 2012 版权所有:湖泊与湿地生态系统对全球变化的响应及生态恢复对策研究
地址:中国科学院南京地理与湖泊研究所,南京市北京东路73号 邮编:210008
苏ICP备09024011号-4